Reversing-gearing



A. J. H. KOK.

REVERSING GEARING.

APPLICATION FILED IAN. I4. 1919.

1,357,71 z, Patented Nov. 2, 1920.

UNITED STATES PATENT OFFICE.

REVERS-ING-GEARING.

Application filed January 14, 1919.

To all whom it may concern Be it known that I, AUcUsr J. H. Kon, a subject of the Queen of the Netherlands, residing at Delft, Zuid, Netherlands, have invented certain new and useful Improvements in Reversing-Gearing; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as willenable others skilled in the art to which it appertains to make and use the same. I

This invention relates to lathes, and more particularly to an improvement in the operating gearing for rotating the head stock for turning the work.

The primary object of the invention is to provide simple and eflicient gearing which is compactly arranged so as to occupy a minimum of space by means of which the head stock of the lathe may be readily rotated in either direction at any desired speed.

A further object is to provide novel and efiicient means for reversing the direction of rotation of the head stock, friction clutches being employed so as to reduce danger of breakage to a minimum.

Another object is to provide means whereby the head stock may be rotated from an electric motor or other suitable source of power, this means being adjustable so as to cause rotation of the stock at any desired speed.

Further objects will appear from the detailed description- In the drawings:

Figure l is a fragmentary side view of a lathe of conventional construction showing a gearing constructed in accordance with my invention applied.

Fig. 2 is a detail of the clutch shifter.

Fig. 3 is a detail of the same and the hold ing springs therefor.

Fig. 4 is a fragmentary detail section of one of the clutches and the means for normally holding the same in inoperative position.

Fig. 5 is a fragmentary side view showing a modified form of driving connection.

The lathe frame designated generally by A may be of any suitable or standard construction and supports a bed '1 provided adjacent one end with the spaced uprights 2 which rotatably support a stub shaft 3 carrying at its inner end the head stock or disk 4: for holding the work. Inwardly directed bevel-gears 5 are mounted for free rotation Specification of Letters Patent.

Patented N 0v. 2, 1920.

Serial No. 271,058.

on stub shaft 3 between the uprights 2 and mesh with a bevel-pinion 6 secured on the upper end of a vertical shaft 7 rotatable through bed 1, the lower end of this shaft being seated in a socket 8 carried by bracket 9 secured to the adjacent supporting upright or leg 10 of the lathe frame. By operatively connecting either one of the gears 5 to the stub shaft 3, optionally, the head stock 4- may be rotated in either direction desired.

Each of the gears 5 is provided with a conical socket 11 in its inner face which is adapted to receive a cone clutch member 12 mounted adjacent thereto and feathered on the shaft 3 for rotation therewith. A shifter indicated generally by 18 is mounted between the clutch members 12 on shaft 3 for movement longitudinally thereof in either direction. This shifter comprises an outer annular member 1 1 provided with the diametrically opposite radially projecting arms 15, and an inner ring 16 mounted concentric with the annular member l l and cooperating therewith to form a raceway for hearing balls 17 which project beyond the oaposite sides of the shifter as in Fig. 1. he outer end portion of each arm 15 is provided with an axial bore which receives the inner end portion of a short rod 18 provided at its outer end with a handle 19, the rod being mounted so as to be readily turned in arm 15, as indicated in Fig. 2. This handle 19 is provided with an extension or shoulder 20 which is adapted to be moved into engagement with either one of two leaf springs 21 carried by a supporting bracket 22 secured to the bed 1, the shoulder 20 acting as a cam to move the shifter in the desired direction. By turning the handle 19 into horizontal position so as to bring the member 20 into contact with one of the springs, as in Fig. 1, the shifter will be moved into engagement with the left hand cone 12 as considered from this figure. thus forcing this cone into the socket of the adjacent bevel-gear 5 so as to cause rotation about the arcuate outer. end of the member 20, thus insuring that the shifter will be held properly in adjustment. When the shifter is in an intermediate or inoperative position, the handle 19 is disposed vertically, and the cones are'held out of engagement with the gears by means of a device such as illustrated in Fig. l. Each cone is provided with a bore extending therethrough which receives a plunger 24 provided at its inner end with a head 25 which is forced into engagement with the gear ,5 at the inner end of socket 11 by means of an expansion coil spring 26 mounted about the plunger and confined between head 25 thereof and a nipple 27 screwed into the outer end portion of the bore which receives the plunger, inward movement of the plunger being positively limlted by 1am nuts 28 screwed upon the outer end portion of the; stem thereof. The plunger acts to' move the cone clutch member out of engagement with its cooperat ng gear when the shifter is moved into inoperative position, the cone being normally maintained in this position by the plunger and associated parts.

A face disk 29 is mounted on shaft 7 and is connected thereto by pin and slot connections, as at 30, so as to rotate. with the shaft andhave movement longitudinally thereof. A short flanged sleeve 31is' slidably moun ed on shaft 7 with its upper end in engagement with the collar of disk 29,. this sleeve being-normally forced upwardly by an expansion coil spring 82 mounted about the shaft andconfined between the sleeve and an adjusting wheel or disk 33 screwed upon the shaft. The spring acts to normally hold the disk in engagement with a wheel disk 34 which is secured upon the squared end of a tubular. shaft 35 rotatable in a bearing collarcarried by a hanger 36 depending from a screw shaft 37 rotatable 1n brackets 38 carried by frameA, a. suitable handwheel 39 being'provided at one end of this-shaft for rotating thesame. The tubular shaft 35 motor shafhandthis disk wheel may be adjusted by means ofthe screw shaft 37 and the hanger 36 across the face of disk 29 so ,as to vary the speed ofrotation thereof thus permitting accurate control of the speed of rotation of the head stock 4:. W here nrac- 1 L Y ticable, or 11 desirable, the motor may be mounted upon suitable supportingrails 4 f for sliding movement thereon, the disk 34 being secured directly upon the armature shaft. of the motor, as in Fig. 5. This'eliminates the tubular sleeve 35 and associated parts, the motor shaft being, together with the motor, shifted by. means of the hanger 36 and screw shaft 37.' If desired, though not necessarily, a compound spur gear wheel 4-5 may be mounted upon shaft 7 so as to permit the shaft to be driven positively from a driving gear carried by a drive shaft for obtaining'a positive drive in cases where ofthe samaanrl I intend to includeall such variations, as fall within the scope of the appendedclaims. in this application in which a preferred form only of my invention is disclosed.

lVhat I claim, is:

1. In a lathe, a rotatably mounted stub shaft, opposed bevel-gears mounted on said shaft forindependent rotation thereon, each of said gears-being provided with a conical socket in its inner face, cone, clutchmembers mounted on the shaft adjacent the inner faces of the respective gears, a shifterslidably mounted on the shaft between said clutch members, said shift-er being provided with outwardly projecting arms, rods mounted in said arms for. free rotation therein, abutment members carried by said rods, and resilient members rigidly supported at opposite sides-of each of said arms and positioned for engagement bysaid abut 2. In a lathe, rotatably mounted shaft.

gears rotatably mounted on said shaft for independent rotation thereon, .clutch' .mem. bers mounted on the shaft adjacent the gears, a shifter slidably mounted onthe shaft. betweenthe clutch members, said shifter being provided with outwardly p ro-' jecting arms, rods rotatably connected with said arms, abutment members carried by said rods, and resilient members rigidly mounted upon opposite sides ofeach of said arms and positioned for engagement by said abutment member for moving the shifter in either direction when the rods are turned in proper direction for movlng a selected.

one of said-clutches into operative engagement with its corresponding gear, and means for rotating the gears in opposite direction.

In. testimony whereof I affix my signature in presence of two witnesses.

AUGUST J. H. KOK.

Witnesses: V 7 i H. SHORT,

NEILMANN. f a 

